Range: 220 - 360 µm/sec
||William G. Hand, Patricia A. Collard and Demorest Davenport, The Effects of Temperature and Salinity Change on Swimming Rate in the Dinoflagellates, Gonyaulax and Gyrodinium, Biological Bulletin Vol. 128, No. 1 (Feb., 1965), pp. 90-101 link p.94 5th paragraph
||"The conversion of data obtained to true linear velocity values was accomplished by comparing the dimension of the projected scan of the 1-mm. calibration on the above-mentioned lucite guide with the actual dimension, which gave the power of magnification. In [investigators'] studies the power of magnification ranged from 360 to 380 ×. This magnification gave accurate readings to the nearest 10µm which was sufficiently accurate to allow analysis of statistical significance."
||"Mean linear velocity for this form was found to be 319µm/sec. at 20°C. Here again plane of movement was not a significant factor. The range was similar, being between 220µm/sec. and 360µm/sec."